Malicious PDF — malware analysis report

Static analysis result for SHA-256 1457d0a8686c3d47…

MALICIOUS

PDF

67.2 KB Created: 2021-02-04 22:09:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a4c6a01a0f2a2f618d9c8bcb016f8760 SHA-1: cce65a3a34abdd58cb3757e25c6ed7a4c6d7dfbc SHA-256: 1457d0a8686c3d474c65eed9a4b13f95e751e6b785ae603bf2787b59a4e3cd32
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/wb?keyword=asymptote%20equation%20standard%20form PDF link annotation
    • https://cdn.sqhk.co/tenokesime/iboKyj1/wibulobunid.pdfIn PDF document text
    • http://natfreshik.fun/76453079437xo9s5.pdfIn PDF document text
    • http://amaryllis.space/pipekokosaxizabamintx97g.pdfIn PDF document text
    • http://lavka-karamel.ru/emoji_keyboard_android_2.3.6ae9r3.pdfIn PDF document text
    • http://vovality.club/58387062193b20ge.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/jijihcG/65509942237.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/iagdUjb/pch_lotto_email.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/tXjigfR/vodajetise.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/BijKmgc/stickman_bike_battle_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/miaShfT/53782914870.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivala/markdown_style_guide_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/pomamuwomixumupudutixuzir.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/83782283102.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/32258858253.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/95310299616.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC804 5372 bytes
SHA-256: 452b9a3cb41923b95fab5c7eacc7dcb4e9625f0912b74709c3754adf585b3f29
font_01_sfnt_off0000da3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3B 11208 bytes
SHA-256: 5f1c7a588320ae7ad61623e868aaa35fe58f505eeb4c3aca80b9b63e82a97557